As a rabid gang of man-hating lesbians*, there's nothing we hate more than a holiday dedicated to a bunch of dudes. (Ultimately this leaves us with Purim and Mother's Day.) Luckily where you find a powerful man, you'll also find the woman he's married to. We call those women "First Ladies." Sometimes they do things and look awesome and people take pictures. Unfortunately, photograph machines are a fairly recent invention so therefore we have a limited pool to choose from. That's fine because one can never look at too many pictures of Michelle Obama, Hillary Clinton or Jackie Kennedy.
Last year we did a Top Ten First Ladies of All Time which was pretty rad, possibly way radder than this.
* just kidding